EP1302648A3 - Method for controlling engine exhaust gas system - Google Patents
Method for controlling engine exhaust gas system Download PDFInfo
- Publication number
- EP1302648A3 EP1302648A3 EP03000710A EP03000710A EP1302648A3 EP 1302648 A3 EP1302648 A3 EP 1302648A3 EP 03000710 A EP03000710 A EP 03000710A EP 03000710 A EP03000710 A EP 03000710A EP 1302648 A3 EP1302648 A3 EP 1302648A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- nitrogen oxide
- fuel ratio
- air
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
- G01N27/4175—Calibrating or checking the analyser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of catalytic converters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/36—Control for minimising NOx emissions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
- F02D41/1479—Using a comparator with variable reference
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16121896 | 1996-06-21 | ||
JP16121896 | 1996-06-21 | ||
JP9139021A JPH1068346A (en) | 1996-06-21 | 1997-05-28 | Control method for engine exhaust gas system |
JP13902197 | 1997-05-28 | ||
EP97304349A EP0814249B1 (en) | 1996-06-21 | 1997-06-20 | Method for controlling engine exhaust gas system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97304349A Division EP0814249B1 (en) | 1996-06-21 | 1997-06-20 | Method for controlling engine exhaust gas system |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1302648A2 EP1302648A2 (en) | 2003-04-16 |
EP1302648A3 true EP1302648A3 (en) | 2005-04-27 |
EP1302648B1 EP1302648B1 (en) | 2006-11-29 |
Family
ID=26471930
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03000710A Expired - Lifetime EP1302648B1 (en) | 1996-06-21 | 1997-06-20 | Method for controlling engine exhaust gas system |
EP97304349A Expired - Lifetime EP0814249B1 (en) | 1996-06-21 | 1997-06-20 | Method for controlling engine exhaust gas system |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97304349A Expired - Lifetime EP0814249B1 (en) | 1996-06-21 | 1997-06-20 | Method for controlling engine exhaust gas system |
Country Status (4)
Country | Link |
---|---|
US (1) | US6012282A (en) |
EP (2) | EP1302648B1 (en) |
JP (1) | JPH1068346A (en) |
DE (2) | DE69736795T2 (en) |
Families Citing this family (69)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6309536B1 (en) * | 1997-10-14 | 2001-10-30 | Ngk Spark Plug Co., Ltd. | Method and apparatus for detecting a functional condition on an NOx occlusion catalyst |
JP3456401B2 (en) * | 1998-02-12 | 2003-10-14 | 日産自動車株式会社 | Exhaust gas purification device for internal combustion engine |
DE19819204C1 (en) * | 1998-04-29 | 1999-09-30 | Siemens Ag | Trimming two-point exhaust gas sensor indication, to compensate behavioral shift due to aging and poisoning |
DE19828928C2 (en) * | 1998-06-29 | 2003-04-17 | Siemens Ag | Method for monitoring the exhaust gas purification system of an internal combustion engine |
DE19830829C1 (en) * | 1998-07-09 | 1999-04-08 | Siemens Ag | NOX storage catalyst regeneration process |
DE19852244C1 (en) * | 1998-11-12 | 1999-12-30 | Siemens Ag | Controlling NOx emission in exhaust gases passing through three-way catalyst followed by lambda sensor |
JP3607976B2 (en) | 1999-03-29 | 2005-01-05 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
EP1196681B1 (en) * | 1999-05-19 | 2003-09-17 | Robert Bosch Gmbh | Method for controlling a rich/lean combustion mixture in a defined manner |
JP2000352307A (en) * | 1999-06-10 | 2000-12-19 | Hitachi Ltd | Engine emission control system |
DE19931321A1 (en) * | 1999-07-07 | 2001-01-18 | Siemens Ag | Method for checking a three-way catalytic converter of an internal combustion engine |
DE19953601C2 (en) * | 1999-11-08 | 2002-07-11 | Siemens Ag | Method for checking an exhaust gas catalytic converter of an internal combustion engine |
JP3782269B2 (en) * | 1999-11-12 | 2006-06-07 | 本田技研工業株式会社 | Air-fuel ratio control device for internal combustion engine |
JP3688533B2 (en) * | 1999-11-12 | 2005-08-31 | 本田技研工業株式会社 | Degradation state evaluation method of exhaust gas purification catalyst device |
US6860100B1 (en) * | 2000-03-17 | 2005-03-01 | Ford Global Technologies, Llc | Degradation detection method for an engine having a NOx sensor |
US6360530B1 (en) | 2000-03-17 | 2002-03-26 | Ford Global Technologies, Inc. | Method and apparatus for measuring lean-burn engine emissions |
US6427437B1 (en) * | 2000-03-17 | 2002-08-06 | Ford Global Technologies, Inc. | Method for improved performance of an engine emission control system |
US6487850B1 (en) * | 2000-03-17 | 2002-12-03 | Ford Global Technologies, Inc. | Method for improved engine control |
US6810659B1 (en) * | 2000-03-17 | 2004-11-02 | Ford Global Technologies, Llc | Method for determining emission control system operability |
US6434930B1 (en) * | 2000-03-17 | 2002-08-20 | Ford Global Technologies, Inc. | Method and apparatus for controlling lean operation of an internal combustion engine |
DE10014239A1 (en) * | 2000-03-22 | 2001-10-31 | Volkswagen Ag | Monitoring the function of a three-way catalyst in the exhaust gas channel of IC engine comprises acquiring the size of the nitrogen oxides signal within the lambda region, and comparing with threshold values |
US6347512B1 (en) * | 2000-04-28 | 2002-02-19 | Ford Global Technologies, Inc. | Method and system for controlling a lean NOx trap purge cycle |
US6363715B1 (en) * | 2000-05-02 | 2002-04-02 | Ford Global Technologies, Inc. | Air/fuel ratio control responsive to catalyst window locator |
US6360159B1 (en) * | 2000-06-07 | 2002-03-19 | Cummins, Inc. | Emission control in an automotive engine |
US6427439B1 (en) * | 2000-07-13 | 2002-08-06 | Ford Global Technologies, Inc. | Method and system for NOx reduction |
US6389803B1 (en) * | 2000-08-02 | 2002-05-21 | Ford Global Technologies, Inc. | Emission control for improved vehicle performance |
US6849239B2 (en) | 2000-10-16 | 2005-02-01 | E. I. Du Pont De Nemours And Company | Method and apparatus for analyzing mixtures of gases |
JP2004523731A (en) | 2000-10-16 | 2004-08-05 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Method and apparatus for analyzing a mixture of gases |
DE60124953T2 (en) | 2000-10-16 | 2007-09-20 | E.I. Du Pont De Nemours And Co., Wilmington | INFRARED THERMOGRAPHIC PROCEDURE FOR SEMICONDUCTOR SEMICONDUCTORS |
US20020192293A1 (en) * | 2001-04-06 | 2002-12-19 | Gadiraju Srinivas R. | Method for manufacture of extended release dosage form |
US7765794B2 (en) * | 2001-05-04 | 2010-08-03 | Nco2 Company Llc | Method and system for obtaining exhaust gas for use in augmenting crude oil production |
US6712604B2 (en) * | 2001-06-15 | 2004-03-30 | Honeywell International Inc. | Cautious optimization strategy for emission reduction |
US6463733B1 (en) | 2001-06-19 | 2002-10-15 | Ford Global Technologies, Inc. | Method and system for optimizing open-loop fill and purge times for an emission control device |
US6487853B1 (en) | 2001-06-19 | 2002-12-03 | Ford Global Technologies. Inc. | Method and system for reducing lean-burn vehicle emissions using a downstream reductant sensor |
US6604504B2 (en) | 2001-06-19 | 2003-08-12 | Ford Global Technologies, Llc | Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine |
US6467259B1 (en) | 2001-06-19 | 2002-10-22 | Ford Global Technologies, Inc. | Method and system for operating dual-exhaust engine |
US6694244B2 (en) | 2001-06-19 | 2004-02-17 | Ford Global Technologies, Llc | Method for quantifying oxygen stored in a vehicle emission control device |
US6539706B2 (en) | 2001-06-19 | 2003-04-01 | Ford Global Technologies, Inc. | Method and system for preconditioning an emission control device for operation about stoichiometry |
US6553754B2 (en) | 2001-06-19 | 2003-04-29 | Ford Global Technologies, Inc. | Method and system for controlling an emission control device based on depletion of device storage capacity |
US6502387B1 (en) | 2001-06-19 | 2003-01-07 | Ford Global Technologies, Inc. | Method and system for controlling storage and release of exhaust gas constituents in an emission control device |
US6453666B1 (en) | 2001-06-19 | 2002-09-24 | Ford Global Technologies, Inc. | Method and system for reducing vehicle tailpipe emissions when operating lean |
US6615577B2 (en) | 2001-06-19 | 2003-09-09 | Ford Global Technologies, Llc | Method and system for controlling a regeneration cycle of an emission control device |
US6546718B2 (en) | 2001-06-19 | 2003-04-15 | Ford Global Technologies, Inc. | Method and system for reducing vehicle emissions using a sensor downstream of an emission control device |
US6594985B2 (en) * | 2001-06-19 | 2003-07-22 | Ford Global Technologies, Inc. | Exhaust gas aftertreatment device efficiency estimation |
US6650991B2 (en) | 2001-06-19 | 2003-11-18 | Ford Global Technologies, Llc | Closed-loop method and system for purging a vehicle emission control |
US6691020B2 (en) | 2001-06-19 | 2004-02-10 | Ford Global Technologies, Llc | Method and system for optimizing purge of exhaust gas constituent stored in an emission control device |
US6490860B1 (en) | 2001-06-19 | 2002-12-10 | Ford Global Technologies, Inc. | Open-loop method and system for controlling the storage and release cycles of an emission control device |
US6453663B1 (en) | 2001-08-16 | 2002-09-24 | Ford Global Technologies, Inc | NOx sensor monitoring |
DE10211781B4 (en) * | 2002-03-16 | 2004-08-12 | Innecken Elektrotechnik Gmbh & Co. Kg | Method and device for monitoring and regulating the operation of an internal combustion engine with reduced NOx emissions |
US7575931B2 (en) * | 2002-06-19 | 2009-08-18 | E.I. Du Pont De Nemours And Company | Method and apparatus for reducing a nitrogen oxide, and control thereof |
US20040126286A1 (en) * | 2002-06-19 | 2004-07-01 | Deruyter John C. | Method and apparatus for reducing a nitrogen oxide |
US6701707B1 (en) | 2002-09-04 | 2004-03-09 | Ford Global Technologies, Llc | Exhaust emission diagnostics |
US7134273B2 (en) | 2002-09-04 | 2006-11-14 | Ford Global Technologies, Llc | Exhaust emission control and diagnostics |
JP3912294B2 (en) * | 2003-02-19 | 2007-05-09 | トヨタ自動車株式会社 | Exhaust gas purification method and exhaust gas purification apparatus for internal combustion engine |
US7460958B2 (en) * | 2004-10-07 | 2008-12-02 | E.I. Du Pont De Nemours And Company | Computer-implemented system and method for analyzing mixtures of gases |
US8236246B2 (en) * | 2004-10-07 | 2012-08-07 | E I Du Pont De Nemours And Company | Gas sensitive apparatus |
US7644576B2 (en) * | 2005-04-25 | 2010-01-12 | Ngk Spark Plug Co., Ltd. | Sensor control device |
JP4779721B2 (en) * | 2006-03-10 | 2011-09-28 | 株式会社日立製作所 | Engine system |
US7255098B1 (en) | 2006-04-27 | 2007-08-14 | Caterpillar Inc. | Engine emissions control system |
JP4665923B2 (en) | 2007-03-13 | 2011-04-06 | トヨタ自動車株式会社 | Catalyst deterioration judgment device |
DE112007003414B4 (en) * | 2007-04-26 | 2020-02-06 | FEV Europe GmbH | Regulation of a motor vehicle internal combustion engine |
JP4492669B2 (en) * | 2007-10-24 | 2010-06-30 | トヨタ自動車株式会社 | Air-fuel ratio control device for internal combustion engine |
US8887490B2 (en) * | 2013-02-06 | 2014-11-18 | General Electric Company | Rich burn internal combustion engine catalyst control |
JP6128041B2 (en) * | 2014-03-31 | 2017-05-17 | トヨタ自動車株式会社 | Internal combustion engine control system |
JP6144652B2 (en) * | 2014-07-23 | 2017-06-07 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
US10760466B2 (en) | 2016-03-24 | 2020-09-01 | Kerdea Technologies, Inc. | Resistive based NOx sensing method and apparatus |
JP2020070769A (en) | 2018-11-01 | 2020-05-07 | マツダ株式会社 | Control device for engine |
JP2020070770A (en) | 2018-11-01 | 2020-05-07 | マツダ株式会社 | Control device for engine |
JP7137146B2 (en) | 2019-01-28 | 2022-09-14 | マツダ株式会社 | engine controller |
CN113804825A (en) * | 2020-06-12 | 2021-12-17 | 卓品智能科技无锡有限公司 | Multichannel parallel automatic calibration method and system for vehicle-mounted nitrogen-oxygen sensor |
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US4770760A (en) * | 1986-08-04 | 1988-09-13 | Ngk Insulators, Ltd. | Electrochemical NOx sensor |
EP0308870A2 (en) * | 1987-09-22 | 1989-03-29 | Japan Electronic Control Systems Co., Ltd. | Electronic air-fuel ratio control apparatus in internal combustion engine |
JPH02125941A (en) * | 1988-11-05 | 1990-05-14 | Nippon Denso Co Ltd | Air-fuel ratio control device of engine |
JPH0373839A (en) * | 1989-08-15 | 1991-03-28 | Nissan Motor Co Ltd | Deterioration detector for catalyst |
JPH04359144A (en) * | 1991-06-04 | 1992-12-11 | Mitsubishi Motors Corp | Nox sensor |
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1997
- 1997-05-28 JP JP9139021A patent/JPH1068346A/en active Pending
- 1997-06-16 US US08/876,396 patent/US6012282A/en not_active Expired - Lifetime
- 1997-06-20 EP EP03000710A patent/EP1302648B1/en not_active Expired - Lifetime
- 1997-06-20 EP EP97304349A patent/EP0814249B1/en not_active Expired - Lifetime
- 1997-06-20 DE DE69736795T patent/DE69736795T2/en not_active Expired - Lifetime
- 1997-06-20 DE DE69737043T patent/DE69737043T2/en not_active Expired - Lifetime
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US4770760A (en) * | 1986-08-04 | 1988-09-13 | Ngk Insulators, Ltd. | Electrochemical NOx sensor |
EP0308870A2 (en) * | 1987-09-22 | 1989-03-29 | Japan Electronic Control Systems Co., Ltd. | Electronic air-fuel ratio control apparatus in internal combustion engine |
JPH02125941A (en) * | 1988-11-05 | 1990-05-14 | Nippon Denso Co Ltd | Air-fuel ratio control device of engine |
JPH0373839A (en) * | 1989-08-15 | 1991-03-28 | Nissan Motor Co Ltd | Deterioration detector for catalyst |
US5303580A (en) * | 1991-04-17 | 1994-04-19 | Robert Bosch Gmbh | Method and arrangement for determining the state of deterioration of a catalyzer |
JPH04359144A (en) * | 1991-06-04 | 1992-12-11 | Mitsubishi Motors Corp | Nox sensor |
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Title |
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PATENT ABSTRACTS OF JAPAN vol. 014, no. 357 (M - 1005) 2 August 1990 (1990-08-02) * |
PATENT ABSTRACTS OF JAPAN vol. 015, no. 237 (P - 1216) 19 June 1991 (1991-06-19) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 231 (P - 1532) 11 May 1993 (1993-05-11) * |
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Publication number | Publication date |
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DE69736795T2 (en) | 2007-08-09 |
EP0814249A2 (en) | 1997-12-29 |
DE69736795D1 (en) | 2006-11-23 |
JPH1068346A (en) | 1998-03-10 |
DE69737043T2 (en) | 2007-06-21 |
EP1302648B1 (en) | 2006-11-29 |
EP1302648A2 (en) | 2003-04-16 |
DE69737043D1 (en) | 2007-01-11 |
EP0814249B1 (en) | 2006-10-11 |
US6012282A (en) | 2000-01-11 |
EP0814249A3 (en) | 2000-02-23 |
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